Bio:

? BCE (The Golden Age; Before the First Ark)

As Arcee was the first in Jhiaxus’ experiments to force differents sexes in the cybertronian race, Roadkill was one of the last. As Arcee was a failed experiment, Roadkill seems to be a little more balanced. Jhiaxus had probably learned from his early mistakes, but Roadkill wasn’t a complete success. She was only discovered after the first Ark left for the Benzuli Expanse, and therefor got news that her “recreator” had disappeared. She didn’t take it well. Roadkill tried to live with her altered CNA, but she well realized that she was different than all the other cybertronians. Eventually, she left Cybertron to find an existence on another planet.

? BCE (During the Great War)

Decades later, word reached her that there was an all-out war on Cybertron between to factions; the Autobots and the Decepticons. She returned to Cybertron, and eventually enlisted on the side of the Autobots, knowing that a scientist named Thunderwing was on the Decepticons’ side and doing vile experiments. She fought in the war for millenia, until she was approached by Arcee, who was hunting Jhiaxus’ experiments, and destroying them.

Given their similarities, it was for the first time and Roadkill actually met someone that was exactly like her. Arcee didn’t take any part in the war, for she only wanted to find and kill Jhiaxus, and Roadkill decided to help her. Not by direct confrontation, but by funneling information to her, giving Arcee an ally in a very useful place.

Eventually, contact between Roadkill and Arcee broke, with the last message being that she was going to investigate an uninteresting planet called Severus-3.